The Base values, CT and VT ratios are as follows:
2.1.
UBase
considered is 400 kV
2.2. IBase considered is 3000 A and the calculations are done considering CT
ratio as 3000 A/1 A and VT ratio as 400 kV/110 V
2.3. Rated frequency = 50 Hz
3.
Set the constant input voltage as, UL1 = 63.5
∠
0° V, UL2 = 63.5
∠
240° V, and UL3 = 63.5
∠
120°
V in secondary at rated frequency.
4.
Set the constant input current as, IL1 = 0
∠
0° A, IL2 = 0
∠
240° A, and IL3 = 0
∠
120° A in
secondary at rated frequency.
5.
Following are the steps need to be followed to check the operation of
Step 1
:
Step
No.
Step1 operating characteristic verification
Expected output
5-a
Inject constant voltages of UL1 = 1.0
∠
0° V, UL2 = 0
∠
240° V, UL3
= 0
∠
120° V and constant currents of IL1 = 0.10
∠
0° A, IL2 =
0
∠
240° A, IL3 = 0
∠
120° A in secondary at rated frequency.
ST1 and START signal should
be TRUE
, to reset ST1 and START.
5-b
Inject constant voltages of UL1 = 57.73
∠
0° V, UL2 = 0
∠
240° V,
UL3 = 0
∠
120° V and constant currents of IL1 = 1.10
∠
0° A, IL2 =
0
∠
240° A, IL3 = 0
∠
120° A in secondary at rated frequency.
ST1 and START signal should
be TRUE
, to reset ST1 and START.
5-c
Inject constant voltages of UL1 = 76.21
∠
0° V, UL2 = 0
∠
240° V,
UL3 = 0
∠
120° V and constant currents of IL1 = 1.26
∠
0° A, IL2 =
0
∠
240° A, IL3 = 0
∠
120° A in secondary at rated frequency.
ST1 and START signal should
be TRUE
6.
for
Step 2
operation, by setting Operation2 (
Step 2
)
ON
, new
values of input currents as per slope characteristics and the
VDepFact2
based on the
I>>
value; check the output ST2 and START.
11.6.1.3
Completing the test
GUID-1F0146A2-2A0D-40D5-AC3C-2160810E9D06 v1
Continue to test another function or end the test by changing the
TESTMODE
setting to
Off
. Restore
connections and settings to their original values, if they were changed for testing purposes.
11.6.2
Current unbalance protection of SCB, SCUCPTOC
GUID-1CF5256E-43B5-4D24-9A71-AB043413D681 v1
GUID-CEB4E17E-DBDC-4201-BDC2-043E6F73BCD6 v1
Prepare the IED for verification of settings outlined in
.
11.6.2.1
Verifying the signals and settings
Operation modes
GUID-8F767261-9D2D-49A7-87E0-CFEDF998FA66 v1
A shunt capacitor current unbalance protection (SCUCPTOC) function can be operated in two
different modes based on the physical connection and configuration of the capacitor bank.
•
1 Unbalance Curr
- Select this option using the parameter setting
SCBConf
, if one unbalance
current is connected to the function.
•
3 Unbalance Curr
- Select this option using the parameter setting
SCBConf
, if three unbalance
currents are connected to the function.
Ensure that mandatory three-phase currents and unbalance currents are connected
to the separate SMAI blocks and their outputs are connected to the I3P and I3UNB
inputs of the SCUCPTOC function.
1MRK 511 403-UEN Rev. L
Section 11
Testing functionality by secondary injection
Bay control REC670
131
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Summary of Contents for REC670
Page 1: ...Relion 670 SERIES Bay control REC670 Version 2 2 IEC Commissioning manual ...
Page 2: ......
Page 28: ...22 ...
Page 54: ...48 ...
Page 60: ...54 ...
Page 66: ...60 ...
Page 90: ...84 ...
Page 212: ...206 ...
Page 218: ...212 ...
Page 232: ...226 ...
Page 240: ...234 ...
Page 241: ...235 ...